Lock for numeral-wheels for adding-machines.



N. WHITE. LOOK FOR NUMERAL WHEELS. FOR ADDING MACHINES.

APPLICATION FILED MARIll, 1908.

Patented Nov. 23, 1909.

4 SHEETS-SHEET 1.

mm Inventor: y (Ma-MK 6M.

WWW QM -N. WHITE. LOGK FOR NUMERAL WHEELS FOR ADDING MACHINES.

APPLICATION FILED MAR. 11, 1908.

Patented Nov. 23, 1909.

4 SHEETS-SHEET 2.

Inventor:

Attest:

N. WHITE. LOCK FOR NUMERAL WHEELS FOR ADDING MACHINES.

APPLICATION FILED MAR.11, 1908.

Patented N0v.23, 1909.

4 SHEETS-SHEET 3.

Attest: M W

4M y Q? Inventor Att N. WHITE.

LOCK FOR NUMERAL WHEELS FOR ADDING MACHINES.

APPLICATION IILED MAR. 11, 1908;

Patented Nov. 23, 1909.

4 SHEETS-SHEET 4.

Attest: Wm WM, Inventor:

a 4Z4 Atty UNITED STATES PATENT OFFICE.

NELSON WHITE, 0]? DETROIT, MICHIGAN, ASSIGNOR TO THE ADDER MACHINE COM-PANY, OF KINGSTON, PENNSYLVANIA, A COYBLPORATION OF PENNSYLVANIA.

LOCK roa NUmEnnL-wHEELs non ADDING-MACHINES.-

.Specification of Letters Patent.

Y Patented Nov. 23, 1909.

7 Application filed'llarch 11, 1908. Serial No. 420,428.

To all 'it concern.

Be it known that I, NELSON WHITE,a citizen of the United States,residing at Detroit,

in the county of Wayne and State of Michigan, have invented certain newand useful Improvements in Looks for Numeral-Wheels for Adding-Machines,of which the following is a specification. v

This invention relates to adding machines and particularly to the wellknown Wales adding machine shown and described in U. S; Letters Patent,#797,032; and its novelty consists in the construction and adaptation ofthe parts as will be more fully hereinafter pointed out.

This machine comprises in all of its forms a bank of keys arrangedmdenominational series, each key provided with a stem by the depressionof which a stop corresponding to the numeral value of the key depressedis interposed in the paths of rack bars, one foreach numeral wheel andone for each denominational'series. These rack bars are suitably mountedto oscillate in proper supports, and are each provided with toothedracks on their upper edges in order that, they may engage with pinions,one on each numeral wheel, to actuate the latter. The numeral wheels areall mounted upon a common shaft and their movement takes place onlywhile the main handle of the machine or the main shaft of the machine(if no handle is employed) is beingoscillate'd.

In order to insure that proper engagement shall take place between thenumeral wheel pinions and their respective racks it is necessarypositively to hold these parts in engagement and to that end the presentinvention is directed and consists in providing the machine with meanswhereby the numeral wheel shaft is locked against movement duringthe'actuation of the handle and while the pinions are engaged with theto-make a record upon a paper strip of the number set up on the numeralwheels, or

forward stroke of the handle but only upon v the backward stroke, and itis only necessary therefor in the enumeration of an item that the racksand pinions should be locked during the rear stroke of the handle. I Therecording of a total requires a mode of operation of the parts which isin efi'ect the reverse of that above stated, that-is, that the itemalready set up on the numeral wheels and which is that the total of allof the several items which have been enumerated during the actuation ofthe machine, shall be transferred to the printing mechanism. It is,therefore, necessary to provide means by which the numeral wheel pinionsand the rack bars are brought into engagement at the forward stroke ofthe handle, so that when the rack bars are moved to operate upon theprinting mechanism the types moved to the point of print by the lattershall correspond to the number which has been already accumulated uponthe numeral wheels. This immediate engagement of the numeral wheels andrack bars is accomplished through the medium of a totalizing key which,when it is depressed, serves, through intermediate mechanism, to removethe normal support upholding the numeral wheel shaft and thereby bringthe pinions -mounted on such shaft down into engagement with the rackbars.

When it is desired to clear the after recording a total, or in otherwords,

machine I to restore the numeral wheels to zero, it is necessary that onthe backward stroke of the handle the numeral wheel pinions and rackbars shall be disengaged and this is accomplished by permitting thetotalizing key to move upward, or to release it from the downwardtension caused by the hand of the operator.

When it is desired to take what is called a sub-total, that is, torecord upon the paper strip the amount which has been accumulated in themachine without clearing the machine and yet to permit such amount toremain upon the numeral wheels and to be added into the itemssubsequently enumerated, the totalizing key is held depressed duringboth movements of'the handle, so that at the end of the backward strokethe wheels are in the same position as they were at the beginning of theforward stroke. It is, therefore, necessary in taking a sub-total thatthe numeral wheel pinions and racks should remain engaged during theentire stroke of the handle, both backward and forward.

It is the purpose of this invention to provide means for locking thenumeral wheel shaft against any movement during any of these operationswhile it is necessary that the numeral wheel pinions shall be inengagement with the rack bars.

1n the drawings, Figure 1 is a general side elevation and partialvertical section of that portion of an adding machine of the kinddescribed, embodying my invention; Fig. 2 is a detail showing the secondposition of the latch and catch and Fig. 3 is a simliar detail showingtheir third position when an item is being enumerated on the machine.Fig. 4 is a side elevation of the parts on a slightly smaller scaleshowing the connection of the latch and catch with the totalizing keyand the position of the parts when tha key is undepressed and before thehandle has been actuated. Fig. 5 is a view similar to Fig. 4 and on thesame scale showing the positions of the same parts when the totalizingkey is depressed and the shaft is at the end of its forward stroke, andFig. 6 is a View similar to Fig. 4 on the same scale showing theposition of the parts when the totalizing key has been kept depressedand the shaft is at the completion of its rearward stroke.

In the drawings, 1 is the frame of the machine which is provided with abank of keys arranged in denominational series, each key having a stemby the depression of which a stop corresponding to the numeral value ofthe key depressed is interposed in the paths of rack bars 20, one foreach numeral wheel. These rack bars are each provided with toothed racks21 on their upper edges and are supported at their front ends on links22 suitably pivoted, on a shaft 31% to which is secured a frame 313pivotally connected at its lower end, with the main shaft, 40, throughthe sector 411 and link 315 at their rear ends upon the extremities ofbell crank levers 23 mounted to oscillate upon a shaft 24-. The otherends of these levers 23 are pivotally connected to the printingmechanism not shown. The rack bars 0 are adapted to mesh with thepinions 30 v :h

These numeral wheels display in proper order on their edges (not shown)the numbers from 1 through 9 to 0, and are all lnounted'on a commonshaft 32.

\Vhen the rack bars are moved the extent of their movement andconsequently the extent of the rotation of the numeral wheels when theirpinions are in mesh with such bars is governed by the position of thekey stops above referred to and the forward movement of the racks to anyextent is controlled by a series of other stops 240 provided for thatpurpose.

The main shaft 10 of the machine is actuated by a handle 400, or by anyother suitable means. 11 is a sector secured to the shaft and 42 is anarm therefor provided at its outer extremity with a roller 13 adapted toengage with a train of mechanism whereby the racks 20 are caused to bereci n'ocatcd.

The keys and their connections and the printing section of the machineare fully described in Letters Patent of the United States No. 797,032,issued to Charles \Vales, August 15, 1905, and reference is prayed tothat patent for a detailed description of such arts.

The numeral wheel shaft 32 is supported in bearings in the frame made upof two bent arms 300, one on each side of the machine. Each arm isadapted to swing on a pivot 301 and is provided with an elbow 302 at theend of which is a catch 303. To the other end of each arm 300 is pivoteda link 310 provided at its lower end with a slot 311 secured to aswinging shaft 312 mounted in a frame 313 pivoted at 314: to the mainframe. A link 315 is loosely secured to the shaft 312 and is pivoted atits opposite end to the sector 41.

Depending from the shaft 32 are two legs 320, each provided with a foot321 and with a pivot 322 on which is mounted a slotlcd link 323 whichengages the shaft 312. The legs 320 normally rest on a recessed support32 mounted at a suitable point on the frame 1.

About half way down the link 2310 there is pivoted to it a link 316which is provided atits other end 317 with a pivot 318 which in turn issecured to a lever 330. This lever is mounted to swing on a shaft 331and is provided at its upper end with an ear 332 so that moving the link310 oscillates the lever 330.

Mounted to swing at 341 on each side of the machine are two bell cranklevers 3-1.0,

i the upper arms of which are each provided with a latch 3 12 adapted toengage with the I catch 303 on the elbow 302. 5 of these lovers are eachprovided with inwardly projecting pins 343 which are adapt ed to engagewith the car 332 on the lever 5 330.

The lower arms A spring 344 serves normally to pull which the numeralwheels 31 are provie l. the lower arm of the bell crank 3 10 toward thenumeral wheel shaft and a stop pin 345 serves to limit such movement.This stop pin is mounted on and projects from a bell crank lever 397pivoted on the shaft 24 and the lower end of which moves under a roll381 on the leg 320 and the movement of which is limited by a pin 50 onthe frame of the machine.

The operation of the parts above referred to is as follows; Suppose thata number has been set up on the keys. The numeral wheel pinions arenormally out of engagement with the rack bars 20 and the legs 320 andlinks 310 are keeping the numeral Wheel shaft arms 300 and shaft 32 insuch a position as to prevent such engagement. After thekeys have beenset, when the actuating shaft 40 is vibrated, the sector 41 is therebymoved and the link 315 swings the frame 313 on the pivot 314 and theshaft 312 then starts to move to the right alongv the slot of the link323 (see Fig. 1). Simultaneously with this movement, the link 310 isswung with its link 311) and .it in turnpulls on the link 316 whichoscillates the lever 330 and consequently moves itsear 332't-o the rightaway fronrthe pin 343 on the latter and allows the lever 340, under the.tension of its spring 344, to move toward the right (see Fig. 1) thusbringing the'top of the latch342 immediately under the catch on theelbow 300, as shown in Fig. 2. The movement of the shaft 312, however,is continued until it's strikes the end of the slot in the link 323,after which it moves the link 323 itself and thus pulls each leg 320away from the support '324. This allows arms tion indicated in dottedlines in Fig. 1 and moves the catch 303 off of the latch 342,- so thatthe lever 340 under the influence of its spring 344 moves the latch toitsfinal, or.

third, positiomas shown in Fig. 3.- In this positionits lower arm isseated against the stop pin 34.5 and the arm 302 and the shaft 32 isfirmly locked into osition. This final resultis obtained simu'ta-neously with the extreme limit of the forward stroke of the mainshaft. The position of thelatch and catch at this time is shown ,in Fig.5. The reverse movement of the shaft is then commenced. in order thatthe rack bars shall rotate the numeral wheels the proper dis tance. Theshaft 312 is first moved along *(because of'the engagement. of the shaft312- tion with respect to such leg.

the left. When it reaches the upper wall of the slot in the link 310 itlifts that link.

This in turn moves the two bent arms 300 and raises the shaft 32, sothat the numeral wheel pinions .are disengaged from their respectiverack bars. The foot 321 is also caused to move over and above'thesupport 324. This movement being assisted by suitable springs 298provided for that purpose. In the meantime, the links 316, moving withthe links 310, have caused the oscillation of the levers 330 so that theears 332 engage with the pins 343 and move the levers 340 back to theirsecond position, as shown in Fig. 2, which takes place just before thefinal lifting of the shaft 32 is effected, and

this latter movement then completely restores the parts to theiroriginal positions, as it lifts the catch 303 away from the latch 342. p

The arrangementv of the totalizing key and its use in connection withthe latch and catch above described will now be eonsid cred. 39 is atotalizing key suitably mounted in the frame 1 of the machine andslotted, at 390 to engage with a guide pin 391 secured at any convenientplace. At its lower end it is pivoted to a bell crank lever 3 adapted tooscillate on the pivot 314 and which bell crank is. also provided with alatch pin 393 adapted to engage with a notch 394 in a latch lever 395pivoted at 393 to the bell crank 39?. A 'sprii, 38 serves to retract thelever 392 to a .pcsith after it has been moved and aspiring 392$ servesto hold the lever 395 in engagementwith the latch pin 393.

A link 38 couples the bell crank lever' 392 to the leg 320 and isprovided with a slot 380 giving it a slight freedom of 1110 This leg isalso provided with a roller 381 which is adapted to'engage with theupperside of the bell crank 397. r When a total is to be recorded it isnecesthe series of items have been enumerated on the wheels. Thisdepression in: turn oscih lates the bell crank 392 which moves the link38 and nnseats the le 320 from the support 324- moving its foot 321 awaytherefrom. Even if this action occurs it will be noted (as shown in Fig.6) that the link 310 will yet be supporting the numeral wheel shaft arms300. The handle 400 of the machine is then moved to the position shownin Fig. 5. At the beginning of this stroke of the handle the link 310 islowered in the manner previously described and. numeral wheel pinionsare consequently brought into engagement with the racks,

the slots of the links 323 and 310, to but at the same time the levers300 havemeia the I.

OSClllEtl fitl, on the pivots 301 to the posit-ion shown in Fig. 5.Simultaneously with this motion the movement of the links 310 has beencommunicated to the link 316 which in turn has moved the arm 330 to theright and ou't 'o'f engagement With the pin 343 on the bell crank 340and has permitted the latter Kimble? tension of the spring 344) to movetofthe position shown in Figs. and 3,

thus preventing any movement of the arms 300and;any:d sengagement of thenumeral wheel p no is and their racks. This has all occurred during thefirst part of the oscillation of the main shaft which if continuedoscillates the rack bars through the appropriate intermediate mechanismto the extent determined by the positions to which the numeral wheelshave been brought during the accumulation of the items set up thereon.During the latter part of the oscillation of the shaft, as the link 310moves downwardly, it permits the latch lever 395 to come into engagementwith the latch pin 393 on the lever 392, because this lever rests upon aroller support 37 projecting from the side of the link 310 and whichmoves downwardly with the link] This latch lever 395 is restored .to adisengaging position with the latch pin 393 by the reverse movementofthe link 310 when the shaft is moved in the reverse direction, becauseof the contact of the roller pin 37 with a cam surface 371 formed on thelowerpart of the latch lever 395. If now it is desired to clear themachine and permit the numeral Wheels to be returned to zero, thetotalizing key 39 1S permitted to rise. Under the tension of the spring382' the lever 392 is pulled upward and oscillated.- The latch pin 393which is then in engagement with the notch 394 of the lever 395 (seeFigsfa and (3) moves this lever 392 toward the left and rocks the bellcrank 397 on its pivot 24 and lifts the numeral wheel leg 320 throughits roller 331. Just prior to this latter movement the upper part ofthebell crank 397, through its pin 345, has moved the lever 340 out ofengagement with the arms 300 so that the numeralwlieel shaft is'nolonger locked by 'tlieengagement of the latch 342 and the catch, 303l-a'n'd is permitted to. rise when lifted by the upward motion oftheleg320 7 above referred to) The parts are. therefore,

in their initial positions.

I A if it"is desired to take a sub-total and to' keep the numeral wheelpmio'ns in mesh witlithe racks during the rearward as well as during theforward stroke of the handle, the" totalizing key 39 instead of beingpermitted to rise at the end of the forward stroke "of the handle isheld down by the operator. *In'such case the lever 392 remains down; Thelatch pin 393 remains'in engagement with the latch lever 395andconsequently the lever 397 is notoscillated and the stop pin 345 remainsin position and the latch 342 remains engaged with the catch 303 untilthe backward stroke of the handle has moved the frame 313 and through itthe shaft 312 until the latter has coilperated with the top of the slot311 to lift and oscillate the link 310 to restore the numeral wheelshaft to its original position. In the meantime the link 310 in itsoscillation has moved the link 316 to the left (as seen in Figs. 1 and4), and this, in turn, has

ing of a total or the taking ofa sub-total.

This is a great advantageand assists materially in insuring the accuracyand certainty of operation of the parts.

\Vhat I claim asnew is 1. In a machine offthe class embodying a mainshaft, racks actuated from said main shaft, numeral wheels adapt ed tobe actuated by the racks but-normally,- raised and disengaged therefromduring the forward stroke of the main shaft, means for automaticallylowering the nuineral wheels into engagement with theracks, a supportfor the numeral wheels in their raised positions, an arm connected toand moving with said support, a latch adaptedautomatically described toengage the arm and hold it against move- 1 ment during a part of themovdment of the main shaft and means ada itedautomatic ally to disengagesaid latch during another part of said movement of the'mainshaft.

In a machine of the class described, em-

bodying a'nlain shaft, racks actuated from said main shaft, numeralwheels adapted to v be actuated. by the racks but normally ,I'tIlSQd anddisengaged therefrom during the forward stroke of the main shaft,ineansfor automatically lowering" the numeral wheels intoengagement'with theracks, a support for the numeral wheels in" their raised positions, an-arm connected to andmoving with said suppor't,a latch adaptedautomatically to engagcthe arm and hold it against movement during apart of the movement of the mainshaft and meansadapted automaticallytodisengage-said latch during another part of said movement of the mainshaft, comprisinga memberiactuated from the mam shaft.

3. In a machineof' the class described,

embodying numeral wheels, actuating racks I adapted to engage therewith,a' main shaft from which the racks are moved, a support for the numeralwheels an arm connected to and moving with said support, a totalizingkey by'the depression of which the numeral wheels and actuating racksare per mitted to engage during the forward actuation of the shaft, alatch adapted automatically to engage thearm and hold it during suchengagement of the racks and wheels, and means adapted automatically tomove the latch out of engagement with the arm cont-rolled by theupwardmovement of the totalizing key., a V

4. In a machine of the class described, embodying numeral wheels,actuating racks adapted to engage therewith, amain shaft from which theracks are moved, a support for the numeralwheels, an arm connected toand moving with-said-support, a totaliz- 7 ing key by the depression ofwhich the nu-v meral wheels and actuating racksare' permitted to engageduring the forward actuation of the shaft, a latchadapted automaticallyto engage the arm and hold it during such engagement of theracks. andwheels, and means adapted]automatically to move the latch out ofengagement with the arm controlled by the upward movement of thetotalizing key, said means comprisinga bell crank lever.

-5. In a machine embodying numeral-wheels, actuating racks adapted. toengage therewith a main shaft from which the racks are moved, a supportfor the numeral wheels, comprising a shaft on which they may turn, anarm connected 't0and moving with said support, a catch I on the arm, alatch adapted to engage said catch to hold the arm against movement,"

means for moving the arm from the main shaft and means whereby the latchis simultaneously moved into engagement with the catch.

(i. In a machine of the class described,

embodying numeral wheels, actuating racks adapted to engage therewith, ama n shaft from which the racks are moved, a suppor for the numeralwheels, comprisinga shaft on wh ch they may turn, an arm connected toand moving with said support, a catch on the arm, a latch adapted toengage said catch to hold the arm against movement, means for moving thearm from the main shaft and means whereby the latch is simul-' taneouslymoved into engagement with the.

catch, in combination with means for re storing the arm to its originalposition and means for simultaneously disengaging the latch from thecatch. I

7. In a machine of the class described, fembodying numeral wheels,actuating racks adapted to engage therewith, and a main shaft from whichsaid racks are moved, a shaft on which the numeral wheels are mounted torevolve, a 'movable supporting frame-for said shaft means adapted tomove the class described,

said frame to bring the wheels into engagement with the racks, a catchon the frame, a latch adapted to engage the catch but nor mallyprevented fromso doing and means connected to the frame moving meanspermitting such engagement when the frame has been moved.

8. In a machine of the class described, embodying numeral wheels,actuating; racks adapted to-engage therewith, and a main shaft fromwhich said racks are moved, a shaft on which the numeral wheels aremounted to revolve, a movable supporting .frame for said shaft, meansadaptedto move said frame to bring the wheels into. engagement with theracks, aca-tchon the frame, a

latch' nor-mall under tension tending to ring about to engagement of thelatch with the catch and means for: preventing such engagement untilafter the frame has been moved.

9. In a machine of the class described, em bodying numeral wheels,actuating racks adapted to engage therewith, and a main shaft from whichsaidracks'are moved, a shaft "on which the numeral wheels are mounted torevolve, a movable supporting frame for said shaft, means adapted tomove said frame to bring the wheels into engagement with the racks, acatch on the frame, a latch normally under tension tending to bringabout the engagement of the latch with'thei catch, [a movable stopadapted to prevent such engagement and means for moving the stop topermit such engagement after the frame has been moved;

10. In a' machine of the class described, embodying-numeral wheels,actuating racks adapted to engage therewith, and a main shaft from whichsaid racks are moved, a

shaft on which the numeral wheels are mounted to revolve, a movablesupporting frame for said shaft, means adapted to move .saidframetobring the wheelsintoiengagement with the racks, a catchon the frame, a

latch, normally under tension tending to brin about the engagement ofthe latch with the catch, and vmeans for preventing said frame to bringthe wheels into engagement with the cracks, acatch on the frame, a latchnormally under tension tending to bring about'the engagement of thellatch with the catch, a movable stop adapted 'to'prevent such engagementand meansformoving the stop to :,-permit-.such engagement after .the',frame has; =been moved, consistingv of, inter-r*mediatewmeohanismconnected to the; stop wand the maintshaft of themachine. v

" 12.: In aamachi-neiof the class/described embodying humeral wheels,actuating racks from which-the racks are moved, a support for;the-'numeralwwheels, means for moving saidsupport, to; secure theengagem'ent-ofthe wheels and racksga'zcatchon the ,supporhIa latch#adjacent' thereto, )means, constantly adapted to engageJherewith, amain shaft tending to move the latch into engagement with the catch. andpositive means preventing such engagement connected to the means formoving the numeral wheel support.

1.3. In a machine of the class described, embodying numeral wheels,actuating racks adapted to engage therewith, a main shaft from which theracks aremoved, a support for the numeral wheels, means for moving saidsupport to secure the engagement of w the wheels and racks, and tosubsequently secure their disengagement, a catch on the support, a latchad acent thereto, means constantly tending to move the latch intoengagemcnt with the catch and means for preventing such engagement andproducing such disengagement connected to the means for moving thenumeral wheel supports.

14. In a machine of the class described,

- embodying numeral wheels, actuating racks adapted to engage therewith,a main shaft from which the racks are moved, a support for thenumeralwheels,'mean s for moving said support to secure the engagement of thewheels and racks, a catch on the support, a latch adjacent thereto,means constantly tending to move the latch into engagement with thecatch, positive means preventing such engagement, a totalizing key, aconnection between the same and the means formoving the numeral wheelsupport and the main shaft for moving said support to secure theengagement of the wheels and racks, a catch on the support, a latchadjacent thereto and means adapted automatically to cause the locking ofthe latch and catch as soon as theengagement takes place.

16. In a machine of the class described,

embodying numeral'wheels, actuating racks adapted to engage therewith, amain shaftfrom which the racks are moved, a support for the numeral.wheels, means actuated from the main shaft. for noving said support tosecure the cngagementof. the wheels ,and racks, a catch on thelsupport,a latch adjacent thereto and, means adaated automatically to cause the.locltingo' the latch and catch as soon as the ei'igagement takes place,

in. combinationwith means actuated from the main shaft tounlock thelatch and catch after the movement of the racks and wheels has ended. hg Y 17. In a machineof the class described. embodying numeral wheels,actuatingiacks adapted to engage therewith, a main shaftfrom which theracks are moved, a support for the numeral wheels, means actuated fromthe main shaft for moving said support to secure the engagement of thewheels and racks, a catch on the support, a latch adjacent thereto andmeans adapted automat ically to cause the locking of the latch and catchas soon as the engagement takes place, comprising a spring normallytending to move the latch toward the catch, a stop arm adapted to holdthe latch against such movement and connections between the main shaftand the stop arm.

-18.' In a machine of the class described,

mbodying numeral wheels, actuating racks adapted to engage therewith, amain shaft from which the racks are movetha support for the numeralwheels, means actuated from the main shaft for moving said support tosecure the engagement of the wheels and racks, a catch on the support, alatch adjacent thereto and means adaptedautomatically to cause thelocking of the latch and catch as soon as the engagement takes place, incombination with means actuated from the main shaft to unlock the latchand catch after the movement of the racks and wheels has ended,comprising a stop arm actuated from the main shaft to move the latchaway from the catch.

19. In a machine of the class described, embodying numeral wheels,actuating racks adapted to engage therewith, a main shaft from which theracks are moved, a support for the numeral wheels, means actuated fromthe main shaft for moving said support to secure the engagement of thewheels and racks, a catch on the support, a latch adjacent thereto andmeans adapted automatically to cause the locking of the latch and catchas soon the engagement takes place, comprising a spring normally tendingto move the latch toward the catch, a stop arm adapted to hold the latchagainst such movement and connections between the main shaft and thestop arm, in combination with means actuated from the main shaft tounlock the latch and catch after the movement of the racks andwheels hasended, comprising a stop arm actuated from the main shaft to move thelatch away from the catch.

20. Ina machine of the class described,

embodying numeral wheels, actuating racks adapted to engage therewith, amain shaft from which the racks are moved, a support for the numeralwheels, means actuated from the main shaftfor moving said support tosecure the engagement of the wheels and racks, means normally retardingsaid movement until the end of the forward means are moved, outof anoperative posistroke-of the main shaft, a totalizingkey by thedepression of which such retarding 2 1,- In a machine of the classdescribed,

embodying numeralwheels,actuating racks adapted to engage therewith, amain "shaft from which the racks are moved, a support forv'the 'numeralwheels, means actuated from the main. shaft for moving saidsupport'tosccureithe'engagement ofthe wheels movement .until the end ofthe forward.

and racks, means normally retarding said Stroke of the main shaft,atotalizing key by the "depression of which such retarding .mean's aremoved out of an operative posit1on,a catch on the support, alatchadjacent.

" thereto and means adapted automatically to cause-the locking of thelatch and catch as soon as the engagement takes place. a

'22, In a machine of the class described,

, embodying numeral wheels, actuating racks adapted. to engagetherewith, a main shaft. from which the r-acks' are moved, a support forthe numeral wheels, means actuated from the main aft for moving saidsupport to secure the engagement of the wheels and racks, means normallyretarding said movement .until the end of the forward stroke of the mainshaft, a totalizing key by the depression of which such retarding meansare moved out of 'an operative position, a catch on the support, a latchadjacent \theret-ofand means adapted automatically to cause thelocking'of the latch and catch as scenes the engagement takes place,incombination with means actuated from the main shaft to unlock thelatch and catch after the 'movementofthe racks and wheels has ended.

' 23.. In a machine of the class described,

embodying numeral wheels, actuating racks adapted to engage therewith, amain shaft from which the vracks-are moved, a support for the numeralwheels, means actuated fromathe-ma-in shaft-for moving said supportr'tosecure therengagementof the wheels and racksiainearis"normally retardingsaid the l depress;

. catch; as'seona's-theengagernent takes place,

moveg'nent -nnti' stroke'of the main shaft, a totalizing key by which'such retarding out of an operative position, acatch: oifth support, alatch adja- 5 cent theretoari'd means ada' tedautomatically-*tojcausewthe.locking-o the latch and the end of theforward' comprising a spring normally tending to move the latch towardthe catch, a stop arm adapted to hold the latch against such movementand connections between the main shaft and the stop arm. 1

24:. In a machine of the class described, embodying numeral wheels,actuating racks adapted to engage therewith, a main-shaft from whichthe'racks are moved, a support for the numeralv wheels, means" actuatedfrom the main shaft-for moving said sup-- port to secure the engagementof the wheels -and racks, means normally retarding said v movement untilthe end of the forward stroke of the main shaft, a totalizing key by thedepression of whlch such retarding means are moved out of an operativeposition,'a catch on the support,.=a latch adjacent thereto and meansadapted automatically to cause the locking of the latch and catch assoon as the engagementtakes place, comprising a spring normally tendingto move the latch toward the catch, astop arm adapted to hold thelatch'against such movement and connections between the main shaft andthe stop arm, comprising-a stop arm-actuated from the main shaft to movethe latch away from the catch.

25. In a machineof the class described, embodying numeral wheels,actuating racks adapted to engage therewith,- a mam shaft .95 fromwhichthe racks are moved," a support for the numeral wheels, means actuatedcause the locking of the latch and catch as soon as the engagement takesplace, comprising a sprin normally tending to move the latch towar thecatch, a stop arm adapted to hold the latch against such movement andconnections bet-ween the main-shaft and the stop arm, in comb nationwith means actuated from the main shaft to unlock the latch and catchafter the movement of the racks and wheels has ended, comprislng a ,stoparm actuated from the main shaft to move the latch away from the catch.

26.,In .a machine of the class described,

embodyingnumeraI wheels, actuating racks adapted to engage-"therewith, amain-shaft. from which theracks are'moved, a sup ort. for the numeralwheels, means actuated om themain shaft for moving said sup ort to vsecure. the engagement of the whee s and racks, means normally retardingsaid movement' until the end of the forward stroke. of a the main shaft,2; totalizing key and a con-.

ncction between the retarding means and said key whereby so long as thekey is held depressed the actuation of the main shaft causes theengagement of the racks and wheels.

27. In a machine of the class described, embodying numeral wheels,actuating racks adapted to engage therewith, a main shaft from which theracks are moved, a support 10 for the numeral wheels, means actuatedfrom the main shaft for moving said support to secure the engagement ofthe wheels and racks, means normally retarding said movement until theend of the forward stroke of the main shaft, a totalizing key and a con.nection between the retarding means and said key whereby so long as thekey is held depressed the actuation of the main shaft causes 'theengagement of the racks and wheels, a catch on the support, a latchadja- 5 cent thereto and means adapted automatically to cause thelocking of the latch and catch as soon as the engagement takes place..2S. In a machine of the class described,

embodying numeral wheels, actuating racks adapted to engage therewith, amain shaft from which the racks are moved, a support for the numeralwheels,means actuated from the main shaft for moving said support to BOsecure the. engagement of the wheels and racks, means normally retardingsaid move .ment until the end of the forward stroke of the main shaft, atotalizing key and a connection between the retarding means and said keywhereby so long as the key is held depressed the actuation of the mainshaft causes, the engagement of the racks and wheels, acatch on thesupport, a latch adjarcentith'ereto and means adapted automatic-40"allyto cause the locking of the latch and c as soon as the engagementtakes place, l il'lkc ollhlllflation W1tl1,1118111S actuated from 'themam shaft to unlock the latch and catch has been ended.

' 29. In a machine of the class described, embodying numeral wheels,actuating racks ad pt'ed to engage therewith, a main shaft i 'wl ich theracks are moved, a support thefnumeral 'wheels,means actuated from theshaftfor moving said support to the engagement of the wheels and,racks'yineans normally retarding said movementuritil itheend of theforward'stroke of the mainsh'aft, a totalizing key and a connectionbetween the retarding means and said key whereby so long as the key isheld depressed the actuation of the main shaft causes the engagement ofthe racks and wheels, a catch on the support, a latch adj afcen,the'rfeto and means adapted automatical'ly'to c'ausethe locking of thelatch and l ateh as soon as the engagement takes place, omprising aspring normally tending to move the latch toward the catch, a stop armadapted to hold the latch against such movement and connections betweenthe main shaft and the stop arm.

30. In a machine of the class described, embodying numeral wheels,actuating racks adapted to engage therewith, a main shaft from which theracks are moved, a support for the numeral wheels, means actuated fromthe main shaft for moving said support to secure the engagement of thewheels and racks, means normally retarding said movement until the endofthe forward stroke ofthe main shaft, a totalizing key and a connectionbetween the retarding means and said key whereby so long as the key isheld depressed the actuation of the main shaft causes the engagement ofthe racks and wheels, a catch on the support, a latch adja cent theretoand n1 ans adapted automatically to cause the locking of the latch andcatch as soon as the engagement takes place, comprising a springnormally tending to move the latch toward the catch, a stop arm adaptedto hold the latch against such movement and connections between the mainshaft and the stop arm, comprising a stop arm actuated from the mainshaft to move the latch away from the catch.

31. In a machine of the class described, embodying numeral wheels.actuating racks adapted to engage therewith, a main shaft from which theracks are moved, a support for the numeral wheels, means actuated fromthe main shaft for moving said support. to secure the engagement of thewheels and racks, means normally retarding said movement until the endof the forward stroke of the main shaft, a totalizing key and aconnection between the retarding means and said key whereby so long asthe key is held depressed the actuation of the I v main shaft causes theengagement of the after the movement of the racks. and wheels racks andwheels, a catch on the support, a latch adjacent thereto and meansadapted automatically to cause the locking of the latch and catch assoon as the engagement takes place, comprising a spring normally tendingto move the latch toward the catch, a stop arm adapted to hold the latchagainst such movement and connections between the main shaft and thestop arm, in combination with means actuated from the main shaft tounlock the latch and catch after the movement of the racks and wheelshas ended, comprising a stop arm actuated from the main shaft to movethe latch away from the catch.

32. In a machine of the class described, embodying numeral wheels, eachwheel provided with a pinion, actuating racks ade 4 ted to engage saidpinions, a main shaft rom which said racks are moved, a movable supportfor the numeral wheels, a catch thereon,

a leg adapted to prevent the displacement of said support, a linkconnected directly to said support, a connection between the main shaftand the link whereby the movement of the latter will move the link andleg to move the support, a latch adjacent to the catch, means tendingconstantly to move it toward the same, a stop arm adapted to preventsuch movement, and a connection between the link and stop arm wherebythe latter is moved to permit the engagement of the latch and catch whenthe support is moved.

33. In a machine of the class described,

embodying numeral wheels, each wheel provided with a pinion, actuatingracks adapted to engagesaid pinions, a main shaftfrom which said racksare moved, a movable support for the numeral wheels, a catch thereon, aleg adapted to prevent the displacement of said support, a linkconnected directly to said support, a connection between the main shaftand the link whereby the movement of the latter will move the link andleg to move the support, a latch adjacent to the catch, means tendingconstantly to move it toward the same, a stop'arm adapted to preventsuch movement, and a connection between the link and stop arm wherebythe latter is moved to permit the engagement of the latch and catch whenthe rectly to said support, a connection between the main shaft and thelink, a totalizing key, a connection between it and the leg, a latchadjacent to'the catch, means tending constantly to move it toward thesame, a.

stop arm adapted to' prevent such movement, a connection between the.link and the arm, whereby when the totalizing key is depressed the legis moved to permit the immediate displacement of the numeral wheelsupport through the movement ofthe link when the main handle is actuatedand simultaneously permits the engagement of the latch and catch.

In testimony whereof I afiix my signature in presence of two witnesses.

NELSON WHITE. Witnesses J. G. VINCENT, EDW. It. BARRETT.

